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Comparison · Infra & APIs
Windmill vs Knock
A side-by-side editorial comparison of Windmill and Knock — release velocity, themes, recent moves, and the top alternatives to consider.
Windmill vs Knock: at a glance
| Feature | Windmill | Knock |
|---|---|---|
| Sector | Infra & APIs | Infra & APIs |
| Velocity score | 6.3 | 6.3 |
| Sparks · 30d | 0 | 1 |
| Top themes | ducklake, data-engineering, open-core, gitops | notification-infrastructure, config-as-code, workflow-orchestration, data-integrations |
| Last editorial update | 5d ago | 17h ago |
| Website | Visit → | — |
What is Windmill?
Windmill is building a DuckLake data-engineering stack on top of its workflow engine
Windmill has shifted much of its recent output into a DuckLake lakehouse layer — schema contracts, fork-isolated data environments, partition backfills, scheduled maintenance, and freshness watchdogs — while also ungating warehouse runtimes and adding reasoning controls to its AI agent steps. It's a high-cadence open-core product where the substance now sits in data engineering.
What is Knock?
Knock is treating notification config like code — branches, tests, and now event-driven waits.
Knock has spent the last two months building the tooling a team needs to manage notification logic as a codebase rather than a settings page: branches with rebasing, sandbox test runs, schema management, tags and saved views. Alongside that it widened what feeds a workflow (Clay tables, warehouse sync) and closed out dashboard security with MFA and passkeys. The delivery engine itself is settled; the surface being built is authoring and governance.
Windmill vs Knock: editorial side-by-side
Windmill
6.3INFRA · APIS
Windmill is building a DuckLake data-engineering stack on top of its workflow engine
◆ Current state
Windmill has shifted much of its recent output into a DuckLake lakehouse layer — schema contracts, fork-isolated data environments, partition backfills, scheduled maintenance, and freshness watchdogs — while also ungating warehouse runtimes and adding reasoning controls to its AI agent steps. It's a high-cadence open-core product where the substance now sits in data engineering.
◆ Where it's heading
The direction is a full data-engineering stack inside Windmill: reproducible pipelines, environment isolation, and observability around DuckLake, with the open-core line steadily loosening as BigQuery and Snowflake move into Community Edition. Expect continued DuckLake maturation and more Community/Enterprise runtime parity, with the heavier automation kept Enterprise.
◆ Prediction
Next likely moves are more DuckLake operational tooling — lineage, alerting, richer backfills — and additional AI-agent-step controls, keeping heavy automation like the freshness watchdog Enterprise-gated.
Knock
6.3INFRA · APIS
Knock is treating notification config like code — branches, tests, and now event-driven waits.
◆ Current state
Knock has spent the last two months building the tooling a team needs to manage notification logic as a codebase rather than a settings page: branches with rebasing, sandbox test runs, schema management, tags and saved views. Alongside that it widened what feeds a workflow (Clay tables, warehouse sync) and closed out dashboard security with MFA and passkeys. The delivery engine itself is settled; the surface being built is authoring and governance.
◆ Where it's heading
Two arcs are running in parallel. The first treats notification config as software — versioned branches, rebasing onto main, tests that run without delivering — which is what a large team with many workflows needs before it will move messaging off in-house code. The second expands the workflow from a linear send into a durable process that can wait, branch, and pull data from outside the product. The newest entry is where those meet.
◆ Prediction
With a wait primitive in place, the next additions are likely more control-flow around it — timeouts, escalation paths, cancellation — plus additional data-source connectors following the Clay pattern.
Alternatives to Windmill and Knock
Other Infra & APIs products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Windmill or Knock.
Cursor
Cursor is becoming a control plane for agent fleets — routed, governed, and driven from a phone.
SigNoz
SigNoz rebuilt its dashboards on an open spec so agents, not just people, can drive them.
Retool
Retool is fitting its app-building agent into a real git workflow, not around it.
Daytona
Ten releases in a month turning agent sandboxes into something you can meter, pause and fork
Auth0
Auth0 is turning B2B workarounds into product, and staking a claim on agent authorization.
See all Windmill alternatives → · See all Knock alternatives →
Recent activity from Windmill and Knock
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoKnockWait for event function ⚡
- 2d agoKnockClay data source
- 5d agoWindmillBigQuery and Snowflake available in the community edition
- 7d agoKnockRedesigned template editor
- 8d agoWindmillAI sessions (beta)
- 9d agoWindmillAttach text files to AI chat messages
- 10d agoWindmillWeb search sources in AI chat
- 14d agoWindmillAutomatic git-to-Windmill sync
- 14d agoKnockBranch rebasing
- 16d agoKnockPasskey authentication
- 21d agoKnockSaved views and tags
- 25d agoWindmillSchema contracts for pipeline consumers
Frequently asked questions
What is the difference between Windmill and Knock?
They serve adjacent needs but don't currently overlap on shipped themes. Windmill and Knock are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Windmill better than Knock?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Windmill and Knock are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.
What are the best alternatives to Windmill?
Top Windmill alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Windmill alternatives" section above for the current picks, or visit /alternatives/windmill for the full list with editorial commentary on each.
What are the best alternatives to Knock?
Top Knock alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Knock alternatives" section above for the current picks, or visit /alternatives/knock for the full list with editorial commentary on each.